Well, I don't know about how often Apple products fail, ...
I and my family members have had something like ten or twelve different Macs, starting with a Mac Plus (ca. 1986), and the only hardware failures I've seen were a diode in the power supply on the Mac Plus, and about a week ago the L2 cache failed on a 2001 G4 "Quicksilver" tower.
Oh yeah - I broke a two keycaps off of a keyboard when I dropped it on the floor, and I finally retired a 15" Apple monitor last year that I had been using since like the mid-'90s. It was getting somewhat dim and giving a bluish caste in places.
I still have the Mac Plus, upgraded with 4MB RAM, a third-party Motorola 68030 25 MHz processor, and an external 10 MB SCSI ZFP hard drive. It still works, along with the original mouse and keyboard.